Function open_and_lock_internal_tables

sql/sql_base.cc:5353–5395

*/

bool open_and_lock_internal_tables(TABLE *table, bool lock_table)
{
  THD *thd= table->in_use;
  TABLE_LIST *tl;
  MYSQL_LOCK *save_lock,*new_lock;
  DBUG_ENTER("open_and_lock_internal_tables");

  /* remove pointer to old select_lex which is already destroyed */
  for (tl= table->internal_tables ; tl ; tl= tl->next_global)
    tl->select_lex= 0;

  uint counter;
  MDL_savepoint mdl_savepoint= thd->mdl_context.mdl_savepoint();
  TABLE_LIST *tmp= table->internal_tables;
  DML_prelocking_strategy prelocking_strategy;

  if (open_tables(thd, thd->lex->create_info, &tmp, &counter, 0,
                  &prelocking_strategy))
    goto err;

  if (lock_table)
  {
    save_lock= thd->lock;
    thd->lock= 0;
    if (lock_tables(thd, table->internal_tables, counter,
                    MYSQL_LOCK_USE_MALLOC))
      goto err;

    if (!(new_lock= mysql_lock_merge(save_lock, thd->lock)))
    {
      thd->lock= save_lock;
      mysql_unlock_tables(thd, save_lock, 1);
      /* We don't have to close tables as caller will do that */
      goto err;
    }
    thd->lock= new_lock;
  }
  DBUG_RETURN(0);

err:
  thd->mdl_context.rollback_to_savepoint(mdl_savepoint);
  DBUG_RETURN(1);
}


/**